一个两层书架,上层放的书本数是下层的三倍.如果把上层的书搬90本到下层,两层的书本数相等.原来上、下层各有多少本书?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/09 00:43:31
![一个两层书架,上层放的书本数是下层的三倍.如果把上层的书搬90本到下层,两层的书本数相等.原来上、下层各有多少本书?](/uploads/image/z/1245146-50-6.jpg?t=%E4%B8%80%E4%B8%AA%E4%B8%A4%E5%B1%82%E4%B9%A6%E6%9E%B6%2C%E4%B8%8A%E5%B1%82%E6%94%BE%E7%9A%84%E4%B9%A6%E6%9C%AC%E6%95%B0%E6%98%AF%E4%B8%8B%E5%B1%82%E7%9A%84%E4%B8%89%E5%80%8D.%E5%A6%82%E6%9E%9C%E6%8A%8A%E4%B8%8A%E5%B1%82%E7%9A%84%E4%B9%A6%E6%90%AC90%E6%9C%AC%E5%88%B0%E4%B8%8B%E5%B1%82%2C%E4%B8%A4%E5%B1%82%E7%9A%84%E4%B9%A6%E6%9C%AC%E6%95%B0%E7%9B%B8%E7%AD%89.%E5%8E%9F%E6%9D%A5%E4%B8%8A%E3%80%81%E4%B8%8B%E5%B1%82%E5%90%84%E6%9C%89%E5%A4%9A%E5%B0%91%E6%9C%AC%E4%B9%A6%3F)
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